Tool-holder



B. T. CARSON.

TOOL HOLDER.

APPLICATION FILED MAR. 22, 1921.

1,392,269. PatntedSept. 27, 1921;

BE/VmW/N 77 Cyesm A TTORNEVS UNITED STATES;

JPTATENT OFFICE.

BENJAMIN T. CARSON, OF REN'SSELAER, NEW YORK.

TOOL-HOLDER.

Specification of Letters Patent. Patented Sept. 27, 1921,

Application filed March 22, 1921. [serial No. 454,36.

tion the shank of the tool holder and the yoke which co-acts therewith are of identical construction and function exactly as-in my prior application.

holder.

Another object in view is to provide an attachment of the character described which does not materiallyadd tothe expense of manufacture of the. tool and which is extremely simple to manipulate.

With the above recited and other objects in view, some of which will appear more clearly hereafter, the invention resides .in'

thenovel construction, combination and arrangementlof parts set forthin the follow-' ing specification, pointed out in the appended claims and illustratedin the accompanying drawings, in which Figure 1 is a side elevation of the tool holder equipped with theimproved attachment and illustrating a tool arranged in position therein. 7 y

Fig. 2 is a plan view thereof with the attachment, removed. V

Fig. 3 is an end View with the attachment ap lied.

ig. 4: is a fragmentary plan view of the shank with the yoke and attachment removed.

Fig. 7 5 is a thereof.

Fig. 6is a plan view of the yoke removed from the shank.

fragmentary side elevation F'g. 7 is a sectional view taken approxidesired to receive.

matelyon the-line 7 .7:of Fig. 6. I

Fig. 8 is a plan view of the clamp element The improvement consists of an attachment therefor invthe nature of a looking or retaining device which seeks forits object to provide a posi-- tive means for clamping the yoke in its ad-' j usted positions and locking the tool againstrelative movement with respect to the of the attachmentremoved from the tool holder.

Fig. 9 isa sectional view therethrough igaken8 approximately on the line 9-9 of Referring to the drawingsfby characters of reference which denote like parts throughout several views thereof, 10 designates a tool which is here illustrated as the diamond point type and llthe shank of the tool holder which is preferably of freetangular formation in cross section andjis provided at one extremity with a head 12 which is preferablyformed integral there with. The outer. end wall 13 is inclined and.

provided with a vertically arranged V- shaped groove 1 1.- The rear edges 15 of the head which are preferably formed by the vertical grooves 16 cut in the opposite side faces of the shank are disposed at'an angle to the inclined outer end wall 13 of the, head. The junctureof'the head withthe body portion of the shank provides shoulders 17 which "are preferably beveled slightly toward the outer end wall. The yoke18 which is adapted to be associated with the head of theshank for securing the tool 10 in place and clamping the same against the end wall is preferably of U- shaped formation and comprises side arms or legs 19,and a connecting 20, the inner face of whic is grooved asat 21'. As illustrated the jfree extremities of the legs '19 are each provided with, an inwardly extending flange 22 constituting a shoulder which is disposed at an angle with respectto the bight 20. The angularity of the flanges 22 are substantially identical to that of the shoulders 17 formed onthe shank headand the inclination of the bight 20 conforms to and'is substantially identical with the inclination of the end wall 13.

In use of the tool holder, the yoke ,is applied to the head of the shank with the legs 19 straddling the same and the inner edges of the flanges, 22 in engagement withtheshoulders 17. It wil1-be understood that upon vertical sliding movement of the yoke the bight 20 willbe moved toward or away from the end wall 13"to increase or decrease the size of the socket formed by the end wall 13 and the bight. The configuration of the grooves 21 and 1 1 maybe VttllBdtO conform to the shape of the tool whichit'is By reference to Fig. 1'

of the drawing it will be seen that as the portion or bight yoke is moved downwardly, the co-acting engagement of the shoulders 17 and the flanges 22 will serve to effect'relative movement of the bight of the yoke toward the end wall 13 whereby to clamp the tool against said end wall. A reverse movement of the yoke will move the bight 20 away from the end wall to permit of the removal of the tool. Likewise the movement of the yoke and the resulting relative movement of the bight toward or away from the end wall will serve to increase or decrease the socket which is formed by the end wall and the bight to accommodate tools of varying cross sectional dimensions. v c I The attachment consists of a clamping member 23 preferably constructed from a steel plate of a width substantially equal tov taining screw 27, the threaded portion 28. of which engages in the threaded socket 29 formed in the shank head 12.

After the tool 10 has been arranged and clamped by the yoke to the end of theshank, the clamp member 23 is positioned on the yoke and the retaining screw 27 is inserted through the central aperture 26 thereof and engaged in the folded socket 29 to lock and retain the yoke in relatively adjusted position with respect to the shank head thereby positively eliminating any possibility of slipping which would tend to loosen the tool. The screw 27 may be also employed to advance and jam the co acting shoulders and flanges 17 and 22 of the shank head and yoke.

It is to be understood that the right is reserved to embodiments other than those actually illustrated herein, to the full extent indicated by the general meaning of the terms in which the claims are expressed and by variations in the phraseology of the same.

I claim:

1. The combination with a tool holder including a shank, an angular outer end provided with a vertical groove, a yoke member adapted to be supported from said end of the shank to constitute a tool receiving socket and means formed respectively on the yoke and the side faces of said shank end adapted to co-act upon relative vertical adjustments to vary the size of the tool receiving socket, of means for positively locking the yoke to the shank.

socket and means formed ,respectivel on "the yoke and the side faces of said s ank end adapted to col-act upon relative vertical adjustments to vary the size of the tool receiving socket, of means for positively looking the yoke to the shank, said means comprising an internally threaded apertured portion in the shank head, an apertured plate bridgingthe yoke member and a headed screw having a threaded shank adapted to be inserted through the apertured plate and engaged in the threaded apertured por tion ,of the head. 7

3. In a tool holder, a shank and means for clamping a tool to one end thereof, comprisingwedge-shaped portions formed on,

opposite sides of the shank adjacent one end thereof, a yoke having wedge-sha d portions adapted to co-act with the we ge shaped portions on the shank whereby upon verticaladjustments of the yoke the bight of the same will be advanced toward or away from the endof the shank, and means carried by the yoke and adapted to co-act a with the shank to lock and retain theyoke in its adjusted positions thereon.

4. A tool holder comprising a shank having portions formed on the opposite sides thereof disposed at an angle to its terminal, a bight and side legs a member havin adapted to stradd e the shank, opposed portions on the inner side of the legs disposed at an angle to the bight and adapted to coact with the portions of the shank to effect relative movement of the bight and shank upon vertical adjustments of the member, an apertured plate adapted to bridge the upper and inner ends of the legs, an internally threaded apertured portion in the upper end of the shank disposed in alinement with the aperture of said plate and a screw having a threaded shank. inserted through said alined apertures and co-acting with the internally threaded apertured portion of the shank to provide means for locking'the bight in its relatively adjusted relations to the shank.

5'. The combination with a tool holder comprising a shank, a tool seat at the forward end of the shank, a clamping device having means to engage the toolopposite the tool seat,and a complementary sliding connection between the shank and clampin device, said sliding connection inclined wit relation to the tool seat, of means for positively locking the clamping device .to the shank. v

6. The combination with a' tool holder, including a shank, a tool seat at the forward end of the shank, a clamping yoke,

complementary engaging shoulders between the yoke and shank, said'shoulders being relatively inclined to the tool seat, of means for positively locking the yoke to the shank.

7. The combination with a tool holder, including a shank, a tool seat at the forward end of the shank, a clamping yoke,

' complementary engaging shoulders between the yoke and shank, said shoulders being 10 relatively inclined to the tool seat, of means for positively locking the yoke to theshank,

said means comprisin an internally threaded apertured portion in the shank, an apertured plate brldging the yoke member, and a headed screw having a threaded shank insertible through the apertured plate and engaged within the threaded apertured portion of the shank.

BENJAMIN T. CARSON. 

